ESS The European Spallation Source (ESS) aims to be the brightest source of neutrons in the world for scientific research. By the end of this decade it will be generating long pulses of neutrons. These will be used in parallel experiments that will foster major advances from aging and health, materials technology for sustainable and renewable energy, to experiments in quantum physics, biomaterials and nano-science. The ESS will be located in Lund, Sweden, co-hosted by both Sweden and Denmark and will be funded and operated by a partnership of 17 European countries. The ESS and partners are currently engaged in a technical design review that will act as the blue-print for the construction of ESS to start in 2013 and to become operational in 2019.